Water, Water, Everywhere

I started filling up the boil kettle to heat some water up to eventually use to rinse the brew system as I was cleaning lines and the newer Therminator for the next brew with PBW. So I turned the water on, puttered around, left to briefly do something as I new it would take a few minutes to fill with 5 gallons. So I was in my office and I heard water. I assumed my son was using the sink. A few minutes later, I though he was still using the sink. I came out ready to yell…then realized the ‘water rushing’ sound was coming from the brew room. Oh no.